A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||4.2||Base Metrics:||AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L|
|Access Vector:||Network||Attack Complexity:||High|
|Privileges Required:||Low||User Interaction:||None|
|Integrity Impact:||Low||Availability Impact:||Low|
|Oracle Linux version 8 (httpd)||ELSA-2020-4751||2020-11-10|
|Oracle Linux version 8 (mod_http2)||ELSA-2020-4751||2020-11-10|
|Oracle Linux version 8 (mod_md)||ELSA-2020-4751||2020-11-10|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team